Feeding mechanism for sewing machines



April 20 1926. 7 1,581,496

r v J. P. was

' FEEDING MECHANISM FOR SEWING mcnmrsv Original Filed June 28; 1921 3Sheets-Sheet 1 IN VEN TOR.

. I BY A Tom/Ev.

{ Q s v I r JoH/yBM L /s,

A ril 20, 1926. 1,581,496

. Y J. P. WEIS FEEDING MECHANISM FOR SEWINGIACHINES Original Filed June28, 1921 5 Sheets-Sheet 2 t: M I

April 20 1926. J. P. was

\FEEDING MECHANISM FOR sawms MACHINES 3 Sheets-Sheet 3 Original FiledJune 28, 1921 i UNITE? Patented Apr. 20',

, oan r; wars,

7 ATESQQPA or mrno x, NEW YORK, assrdnoaronar'aorom'rm antimon- 'f camecoaroaa'rron; or mack, mew ronx acoarom'rron or nnnawnm rnanrne micmimsmseesaw-me Jammie,

Original application-filed June as, 1921, we No. 431,032, Divided/andan, i uifibiineafoedm" I 9,1823, jeri'allo. 687,453. 1- I citizen-of.-the United; States, eresidin at .i N ack, in the county-ofRoclrland and tale.

'To all whom Be it-kriowmthat .1, JOB P. w s, a I

0 New York, have,inventedcertainnew and in Feeding Mechan sm sewingmachines, and more particularly present instance is preferably ofcylindrical construction wherein'the ,feed ngand part of the stitchin,mechanisms are contained,

and operated orthepurpose of working,

' upon or forming tubular goods,,an object ,0 the invention being toprovide a .sewing i machine adapted. 1 to operate efiiciently. at.

high speeds and comprising improved, feed- .ing mechanism coacting Ifootnfor feeding the work through the machine. 7

This application is a division of m co pending application for sewingimac ines led June 28, 1921,,Serial No. 481,Q32, and .a further objectof the present invention is toprovidea feeding mechanism for sewingmachines embodying improved adj ust- .ing means, preferably self-looing,,f or regulating thelen'gth of stitch or the throw off constructionQ and arrangement of parts the feed dog. In the; present instance thelength of stitch of theqthrowoithe feed therewith. i a Other objects ofthis invention will appear I --in the following description and appendedclaims, reference being had :tdthejaccompanying specificat1on, whereinlike reference characters indicate corresponding parts, inthe severalviews 'and'WhereinLEig. 1 is a side v s a bottom, and 'havm rear wall;

elevation of the machine illustrating par- 1 ticularl-y the transmitteror driv ng. mechas nlsm, which isshownin-operating position beneath themachine but detached from the work table tov more clearly illustrate therelation of the transmitter with the sewing machine; Fig.2 isarearele'vation of the machine,'illustrating the-connections for theneedle drive and a. ortion of theloo er and feed actuating mec amsms;Fig. 3 1s a top with the ,presser;

drawings forming apart of this cu n t l p ari view o fif h fdinimihanismfutih" overhanging arm and cyinder of the ma chine ing: sh w ibr ken" n g- 4 is a sectional view takenf'on lines" of ;Fig 6;" Fig, ,5[is a sectional d'etail view [taken on l ne 5-5 of Fig. 6, andillustrates a portion of theIeed barlwiththe "eccentric I bushing, lock'nut' and screw; which com rise Fens-e f raising n ow rihg th ;F1g. 6i saside elevation'ofthe feedin mech- .of illustratin the manner'in whichthe parts 7 are lubricate from ,the overhead reservoir and, the tubular.outlets leading-to the "8 V:

eral bearings, also showing in elevation the. 6

l Pl P, oil pump driving h 1 and the tubes C l i ii h l] ail "ffro'm theQ11 fi mP q h reservoir at the top of'fthe ine;and, Fig, Sis aside"elevation of 7', also'illusthe machine mac the mechanism shown in ,Fitratinlg the construction o? fram,, tOgQ her with parts of thelubricatingvinechanism.

vBefor explaining injdetail 1 the present I improvement" and mode ofoperation therenvention is not limited, arsenals of willbe seen.

I desire to have it understood that'the that the present machine'is'inounted, upon a a suitable table 1 and oomprises'a ima'chine frameof specialoil-tight construction hav- .ing' lflan e52, and?) forsupportin and seef machine to the table. he main portionoffthe frameispreferablyof hollow rectangular construction, closed at theaffrontwall and a 5 sprovi ed with an opening 6 plate 7 attached theretoin any suitable I manner. This cover'plate 'isfprovi'ded with'fhonqwprojecting ortion 8 within which operates a stop"1ever,. 0 f.swppi gig s adapted to be closed by means o tj alcove:

andG, the cover plate 7 being of similar form and adapted when closed toseal the opening "against Teakage of oil. The front wall 4 of the frameis provided with a boss 11 bored to receive a cylinder 12. The side wall13.0f the frame is provided with a boss 14 for receiving one of thecrankshaft bushings 15, the opposite side wall having a boss 100 forreceiving the opposite crankshaft bushing 99. The frame is providedwithinwardly projecting bosses 26 and 29 bored to receive bushings forsupporting the crank shaft of the machine. Projecting from the frontwall 4 is an overhanging arm 32 terminating inf a bearing 33. A'presserbar 183 reciprocates verticallyin a bushing .187 carried by the bearing33, and a presser foot 188 is secured to the lower end of thepresserbar. Above this bearing is a rectangular opening 34 through whichthe presser foot lifting member 180 operates. A needle bar 48 operatesin the bearin member 33 and. is. provided with suitab e needle mechanism51, the needle bar being operated by suitable mechanism described in mya ove mentioned application.

As shownin Fig. 8, the rear, wall 5 is inclined to the left of theperpendiculsn', an

7 advantage thereof being to assist in properly 16 has a rectangularopening 24 into which projects a laterally extend ng portion of the stoplever 118, this opening also affording a passage for the lubricantreturning from the bushing of the crank shaft housed in the boss 100.1The side wall 16 around the rectangular opening 24 is provided withasuitable boss forming a seat for a belt guard 22 which covers the-drivebelt 23,

andthe clutch and pumpwheels 93 and 425.

Mounted in end bearings 15 and 99 of the 3 frame, and in suitablebearings in bosses 26 and 29 is a transversely extending crank shaft 63havin a clutch wheel 93 provided with a suitable )elt groove over whichpasses Y belt 23 of the transmitter.

The power transmitter comprises in generalamain bracket 143 securedto'the bottom of the table in any suitable manner, the

I bracket having an j arm bored to receive a shaft 144. Upon this shaftis mounted a cone pulley 145 over which operates a belt 146 fortransmitting power from any suit able line shaft to'the pulley. The belt23 is driven by apulley'149 for operating the sewing machine. ,Suit ableclutch mechanism for the pulleys 1'45 and 149 is provided which iscontrolled by means of a rod 156 connected to a floor treadle (notshown). A further detailed description of the power transmitter n1eehanism is not deemed necessary herein since the same is fullydescribed in my copending application.

Referring particularly to Figs. 3, 4, 5, and 6 a four motion feedingmechanism c0- acting with the presser foot is provided for feeding thework through the machine. This feeding mecbanism embodies self lockmgadjusting means for regulating the length of stitch or the throw of thefeed dog. such regulation being accomplished by an adjusting instrument,preferably as herein shown in the form of a keywrcnch, there: by toprevent unauthorized persons from changing the length of' stit-ch. Suchadjust ing means may preferably be so constructed as to be; manipulatedonly by a special instrument, thus rendering it a simple matter tochange the length of stitch'merely by turning the adjusting means oneway or the other to the desired position, as indicated by a gaugeregistering the length of stitch required. V

j The feed mechanism comprises a feed dog 208 which may be of anypreferred form to suit the character of work. The shank 209 of thefeed'dog is slotted at 210 to receive a forward attaching screw 217,

and also has an open ended slot 211 to receive the rear attaching screw218; The attaching screws are tapped into-the forward end 212 of thefeed bar generally indicated at 213. The bottom surface of the feed dogis cut away at an angle at each side of the center line 214, to givefree space at 215 and 216 to permit the feed dogto be tilted so that thetoe of the feed dog will engage the work in advanceof the heel or viceversa, or to permit the feed to be eveled. These adjustments areobtained by adjusting the attaching screws as desired, as for instance,if the screw 217 is loosened and the'screw 218 is tightened, the'toe ofthe feed will "be tilted upward. If this adjustment is reversed t e toewill be tilted downward, and the heel will engage the work first. V

By virtue of such adjustment the -w0rk may either'b'e gathered orstretched, or fed out smoothly without either gathering or stretchingFurthermore after a predetermined adjustment of the feed has been made,the feed may be removed at any time without destroying or disturbingsuch adjustmentby mere y removing the forward screw 217 withoutdisturbing the rear screw '218, and withdrawing the feed dog 208 fromembracing the bar and supported by astud screw 219. The yoke isconnected to the feed bar 213 by a bolt 221 havinga shoulder 222operating in one side of the link, while a nut 223 aving a shoulder 224operates in the opposite side of the link 220. v

The feed bar is bored to receive an eccentric bushing 225, which isclamped. between the inside faces of the yoke link by the bolt 221 andnut 223. The shoulder 224 of this nut is tapped to receive the threadportion 226 of the bolt, while the body 228 of the bolt fits freely intothe eccentricbushing. The shoulder 222 of the bolt and the shoulder 224of the nut 223 clamp the bushing securely to the bolt and to the sidewalls .of the link 220, permitting the feed bar 213 to rock on theeccentriebu'shing, It will be seen that the construction is such thatthe height of the feed dog may l1e adjusted relative to the throat platemerely by turning the eccentric 225. The cylinder12 is provided with anaperture 229 in each side wall through which maybe inserted screwdrivers to engage the heads of the bolt 221 and the nut 223, and byloosening the nut and turning the bolt the eccentric will be turned withit so as to raise or lower the feed dog to, the desiredheight. The'ad:justment is locked by holding the bolt with one screw driver andtighteningthe nut with another. Four-motion movements are transmitted tothe feed bar by the ball crank 69 of thecrank shaftoperatin in thebearing 230 of the feed lever 231. he rear end 2320f the feed bar 213 isconnected to the feed lever 231 by means of a joint pin 233 secured inthe feed lever 231. The feed lever has a wall of a slideway in whichoperates a slide block 235. This slide blockis supported by ands lides0n a stud screw 236 carried by arms 237 and 238 of an adjusting yoke 239adjustablymounted on a vertical post 211) secured in the machine frameat 241 and 2 42. The post 240 is preferably tubular and the lower end isprovided with a flattened guide piece 243 secured inthe tube by a pin244, and'proj'ecting downwardly into a slot,

245 of the rear end 232 of the feed bar and preventing lateral movementthereof. The forward end of the feed bar-.213 is guided against lateralmovement by the side walls 246 of the slot 247 formed in theiend bearin248. A

The adjusting yoke 239 is slotted at 219 to receive a key nut 250provided,.with a flange 251 secured to the yoke by screws 252. The innerportion of thekey nut is screw threaded to engage the left hand threads254 on the lower end of a vertical screw 255-, the upper end of whichgisprovided with right hand threads 256 engaging corresponding threads inthe post as at 257. The upper end of the screw 255is provided with aflattened key .258 to. receives key wrench 260 for turning the screw,the upper end'of the post being bored 2112259 to receive the feed, lever231 t 'ereby imparting increased movementto the feed bar 213 and tothe,ifeed dog 208. 'Adjustment in the opposite direction decreases'thelongitudinal movement of the feed dog'due to the fact that as the slideblock 2351s moved downwardly in the guideway an increasingly restrictedlateral movement is imparted to the feed bar 213 by the feed lever 231operating on the adjustable fulcrum formed by the rocking slide block235. An adjustable collar 262 is mounted on the post 255 above the yoke239 to limit the upward' movement o' the yoke when adjusted at theproper point. The machine casting is provided with a projecting portion263 against which the yoke may engage, thereby limiting the downwardmovement thereof. From this construction therefore it will be'seen'thatthe necessity of any locking device for locking the adj ustingmeansin adjusted position is obviated as the adjustment cannot change ofitself. The stops 262 and 263 limit'the'feed dog movement in order toprevent it from striking either end ofthe feed slots in the throatplate. The key wrench 260 isprovid'ed with a scale of graduations 260representing or indicating predetermined lengths of stitches ormovements of feed, and such graduations register with an indicator 264which aligns with the body of the key wrench when it is in positionforadjusting the feed. Thus the 'key wrench and cooperating'partsconstitute not .only a means of accurate and minute adjustment of thelength of stitch or movement of feed but also amicrometer gauge formeasuring-accurately to fractionsv of an inch the lengthof stitch at anytime. It is merely necessary to insert thekey wrench in position andtheindicator will point to thejproper graduation representing the exactlength of stitch.

Fromthe foregoing it will be seen that the length of stitch can bechanged while the machine is in operation, and that by means of theright and left hand threads; on adjust-ingscrew 255 the latterwill'after each adj ustment be effectually locked against disturbanceand can not turn of itself on account of the vibration of the machine,This screw 255 is therefore self-locking and can be turned only byinsertingthe key wrench through the opening at the top of the tube orpost 240. It will be noted that by virtue of the engagement of the upperset of threads of the screw with threads 257 at the upper end of tube240 the screw when rotated will. shift endwise. Thus if the pitch of thethread on the screw is inch the fulcrum will be shifted inch upon eachrotation of the screw.

The hollow rectangular frame of the machine forms a fluid-tight oilchamber within which is located mechanism driven from the crank shaftfor automatically lubricating the various operating parts, as describedin my above mentioned co-pending application. It will be particularlynoted that the entire mechanism for adjusting the length of stitch ishoused within thiscompartment or hollow frame, as shown in-Fig. 6, andthat there are no openings in the frame through which lubricant canescape. V

This is highly im ortant in a machine that is automatically ubricatedsince the oil will escape through any opening at the sides or top of theoil chamber. This fulcrum adjustin mechanism is entirely encased withint e rectangular frame out of sight, and nothing appears on the outsideof the machine to suggest such an adjustment. This is also importantbecause the-type of machine in which it is used requires that the stitchbe changed only by an authorized person'such as the foreman,- and not bythe operator.

From the foregoing construction of the machine frame it will be notedthat this frame forms a reservoir having the four sides and the bottomintegral, and when the rear cover plate 7 and the belt guard 22 areapplied, the entire structure is closed and is sealed against anypossible leakage of oil. It is further to. be noted that the feedmechanism, the adjusting mechanism therefor, and the locking mechanismare housed within the machine frame, and at the same time, theconstruction is such that the adjustment of the feed mechanism may beobtained not a only during the operation of the machine,

but Without permitting the leakage of oil.

As hereinbefore stated, the machine frame forms an oil reservoir, andautomatic lubri cating mechanism is provided for the various bearings ofthe machine. Adjacent to the bottom 90f the frame and located in theside wall 16 is an inwardly projecting boss 30 bored to receive a pumpcasing 31, (see 1 Figs. 7 and 8). A pump belt wheel 425 is carried by ashaft 426 at the endof which is attached a small gear 427 meshing with asimilar gear 428 carried by a shaft 429. These gears operate in asuitable recess of to the pump casing thereby covering the.

gears, and the casing is made air tight by means of packing 434.

The plate; 432 is gears and forced up thru a pipe 435' to a reservoir439 provided with a top cover plate 447. V The oil is delivered from thereservoir 439 through outlet tubes 451,452, 453, and 454, each of whichhaving its delivering end located to deliver oil therefrom to therespective bearings. The tube 454 conducts oil to the funnel-455 carriedby a horizontal tube 456, the end 457 directing lubricant to the bushing15, and the opposite end 458 directing lubricant to the bushing 101. Thetube 451 supplies the intermediate bearings ofthe crank shaft 63. Thetube 452 sup-- plies the crank 67 and other mechanism such as the'looper actuating mechanism. The tube 453 supplies the crank 69 and thefeed ing mechanism with lubricant. Portions of the lubricant thrown fromthe cranks 67 and 69 are caught by the plate 459 secured to the coverplate 7 which has a tapered extension termmating in a spout end 461, fordelivering oil directly to the reservoir 125 of the stop lever 118, thissupplying the oil buffer 124 of the stop lever. The oil buffer isconnected with the reservoir 125 by holes 124*. The lubricant isdirected through the crank shaft,-and the escaping lubricant is caughtin a separate receptacle 469, thence passing through the outlet 470 intothe interior of the machine. I

Some of the oil which escapes to the belt wheel 93 is thrown off fromthis wheel and caught inside the belt wheel guard 22 by receptacles 469and 472, the latter receptacle having an outlet 473 into the interiorreservoir of the machine frame. It is noted that the outlet tubes 470and 473 project through the rectangular opening'24 in the side Wall ofthe machine frame. The pump is operated by means ofa pulley wheel 425which is operated from the drive belt 23.

A further detailed description of the lubricating mechanism is notherein deemed necessary since the same is fully described in .myc'o-pending application, Serial No. 678,-

I provided with an inletfor the lubricant which is drawnin by the thefeed mechanism from the outside without leakage of oil, and withoutstopping the operation of the machine.

It is to be understood that by describing in detail herein anyparticular form, structure or arrangement, it is'not intended to limitthe invention. beyond the terms of the several claims or therequiren'icnts of the prior art.

Having thus explained the nature of my said invention anddescribcd a wayof constructing and using the same, although without attempting to setforth all of the forms in which it may be made, or all of the modes ofits use, I claim: I

1. In a sewing machine, the combination of a four-motion feed bar, afeed dog pivoted to said feed bar, and a pair of vertical adjustingscrews extending thru said feed dog at opposite sides of said pivot andcooperating with the feed bar for swinging said feed dog relatively tosaid feed bar.

2. In a sewing machine, the combination of a four-motion feed bar, afeed dog pivoted to said feed bar, and a pair of vertical adjustingscrews eXtending-thru saidfeed dog at opposite sides of said pivot andcooperating with the feed bar for swinging said feed dog relatively tosaid-feed bar, said feed dog having a horizontal open slot for receivingone of said screws to permit removal of the feed dog without disturbingthe adjustment of said screw.

'3. In a sewing machine, the combination of a reciprocating feed barhaving an upper horizontal face, av feed dog having-oppositely inclinedbottom faces resting upon said horizontal face, and a pair of adjustabledevices shiftable in opposite directions for adjustably'tilting saidfeed dog on said horizontal face.

4. In a sewing machine, the combination of a reciprocating feedbar'having an upper horizontal face, a feed dog having opposite- 1yinclined bottom faces resting upon said horizontal face, a pair ofadjustable devices shiftable in opposite directions for adjustablytilting said feed-dog on said horizontal face, and means for permittingremoval of said feed dog without disturbing theadjustment of oneofsaiddevices.

5. In a sewing machine, the combination of a feed bar having ahorizontally extending feed dog sup-porting portion, a feed dog having ahorizontally extending shank overlapping said portion andpivotedthereon, a' pair of vertical adjusting "screws extending thrusaid shank and cooperating with the feed bar, said shank having at itsrear end an open slot adapted to receiveone of said screws and to permitremoval of the'feed dog without removing-said last screw.

6. In a machine, the combination of a four-motion feed bar, a feed doghaving the base thereof provided with a pair of oppositelyinclinedfaces,and a pair of independently shiftable means extendingthrough said faces for adj ustably connecting the feed dog to the feedbar.

7. In a sewing machine, the combination of a feed bar, means foroperating the same, a feed dog supported on said bar, said dog havingthe bottom'thereof formed withoppositely inclined faces adapted to bearagainst the inppe'r face of said bar, and means intermediate the ends ofeach inclined face for adjustably connecting said feed d g to the feedbar.

8. In a sewing machine, the combination off'a drive shaft, feedingmechanism connected thereto and comprising'a feed bar, swinging meansfor supporting the same, a feed dog carried'bysaid feed bar, and meanscarried by said swinging means for raising or lowering said feed barrelatively to said swinging means.

9. In a sewing machine, the combination of a drive shaft, feedingmechanism connected't-hcreto and comprising a feed bar, a feed dogcarried thereby, swinging supporting means for said feed bar, means forvarying the height of said feed dog and comprising an adjustableeccentric carried by said supporting means.

10. In a sewing machine, the combination of a drive shaft, a verticallyextending memher pivoted at its lower end for swinging movement, anadjustable eccentric carried at the upper end of said member, and a.feed bar operated from said shaft and supported on said member throughthe medium'of said eccentric.

11. In a sewing machine, the combination of feeding mechanism comprisinga feed bar and a feed dog carried thereby, means for swinginglysupporting such feed bar, a. rotatable eccentric carried by said meansand cooperating with the feed bar for adjusting the feed bar relativelyto said means. j

12. In a sewing machine, the combination of an upright supporting yokepivoted at its lower end for swinging movement, a. rotatable eccentriccarried at the upper end of said yoke, and a feed bar supported on saidyoke through the medium of said eccentric.

13. In a sewing machine, the combination of a Work support, a feed bar,a feed dog connected thereto, means for imparting a four-motion path ofmovementto sald'feed bar, a swinging member pivotally supported by saidwork support, means carried by said member for adjusting the height ofthe feedbar relatively to said member to vary the path of movement ofthe feed dog.

14. In a'sewing machine, the comb nation of a drive shaft, feedingmechanism controlled thereby and comprisin a feed bar, a feed dogcarrled b said feed er and means for adjusting the t row of said feedbar, said last means comprising an endwise shiftable .said lever, avertically shiftable fulcrum member forming an adjustable fulcrum forsaid feed lever, a vertical tubular member mounted in said frame, ascrew housed within said member and having at its upper end a keylocated below the top of said tubular member, said tubular member havinga ver tical slot at its lower end, a key nut secured to said fulcrummember and extending into said slot and having threads engaging a set ofthreads on said screw, saidscrew having a set of threads at its upperend engaging threads in-said tubular member, one of said sets of threadsbeing left hand and the other set right hand threads, and a key wrenchadapted to be inserted into said tubular member for rotating said screw.

16, In a sewing machine, the combination of a machine frame, a shaftsupported thereby, a feed lever eccentrically connected to the shaft,cloth feeding means connected to saidlever, a vertically adjustablefulcrum member for said feed lever, a vertical tubular member mounted insaid frame, a screw held within said member and having at its upper enda key located below .the top of said tubular member and having at itslower end threads effective upon operating said screw for adjusting thefulcrum, and means coacting with said key for operating the screw.

17. In a sewing machine, the combination of a machine frame, a shaftsupported there by, a feed lever eccentrically connected to the shaft,cloth feeding means connected to said lever, a vertically adjustablefulcrum member for said feed lever, a vertical tubular member mounted insaid frame, a screw held within said member and having at its upper enda key located below the top of said tubular member and having at itslower end a set of threads, said tubular member having a vertical slotand said fulcrum having a threaded portion extending through said slotand engaging said set of threads, and means insertable into said tubularmemher and co-acting with said key for operating said screw.

18. In a sewing machine, the combination of a machine frame, a shaftsupported thereby, a feed lever eccentrically connected to the shaft,cloth feeding means connected tosaid lever, a vertically adjustablefulcrum member for said feed lever, a vertical tubular member mounted insaid frame, a screw held within said member and having. at its upper enda key located below the top of said tubular member and having at itslower end a set of threads, said tubular member having a-vertical slotand said fulcrum having a threaded portion extending through said slotand engaging said setof threads, said screw having at its upper end aset of threads engaging interior threads carried by said tubular member.

19. In a sewing machine, the combination of a machine frame, a shaftsupported thereby, a vertical reciprocating feed lever con nectedto'said shaft, a feed bar operated by said feed lever, an adjustablefulcrum member for said feed lever, a vertical screw connected to saidfulcrum member for adjusting the same, a vertical tubular post carriedby said machine. frame for housing said screw, said 0st having adjacentthe upper end thereof a set of interior threads engaging exteriorthreads on such screw.

20. In a sewing machine, the combination of a drive shaft, a feed-levereccentrically connected thereto, and adjustable fulcrum member connectedto said feed lever, a vertical screw having a set of threads forshifting said fulcrum member and a set of threads co-acting with fixedmeans carried by the machine, one set of threads being right hand andthe other set left hand threads, and means for rotating said screw tovary the throw of the feed lever.

21. In a sewing machine, the combination of a drive shaft, a feed leveroperated thereby, adjustable slide means forming afulcrum for saidlever, a vertical screw having two separate sets of threads, onefeetco-acting with threads carried by said slide means and the other setco-acting with a stationary threaded portion carriedby the machine, andmeansfor rotating said screw to adjust said slide means.

22. In a sewing machine, the combination of a machine frame, a driveshaft carried by the frame, a feed lever connected to said shaft, a feedbar connected to said feed lever, an adjustable slide means formingafulcrum for said feed lever, a vertical screw for shifting said slidemeans and entirely housed within a vertical tubular portion carried bythe frame, the upper end of said screw. being located within and asubstantial distance below the top of said tubular portion, and animplement adapted to be inserted through the top of said tubular portionfor operating the screw.

23. In a sewing machine, the combination of a drive shaft, feedmechanism controlled thereby and comprising a feed bar, means forregulating the throw of said feed bar and including an adjusting-screwhaving two sets of oppositely inclined threads effective to maintain thescrew against displacement during the operation of the machine.

24. In a sewing machine, the combination of a rotary shaft, a feed bar,a-feed lever connected to said feed bar and shaft, an adjustable fulcrumfor said feed lever for varying the effective movement of said feed bar,and a screw having a set of threads, for adjustingthe fulcrum and a setof oppositely inclinedthreads coacting with a stationary part of themachine.

25. In a sewing machine, the combination of a drive shaft, feetlmechanism controlled thereby and comprising a feed bar, means capable ofoperation while the machine is in operation for regulating the throw ofthe feed bar and including a rotary adjusting screw having means forpreventing displacement of the screw during the operation of themachine. a

26. In a sewing machine, the combination of a hollow machine-framehaving an oil tight oil carrying chamber, a drive shaft, lubricatingmechanism automatically operated from said shaft, feed mechanismincludinga feed bar, means extending into said chamber for regulatingthe throw of said feed bar, means for operating said means from theoutside of the machine while the machine is in operation, and means forforming an oil tight joint about said first means.

27. In a sewing machine, the combination of a hollow machine framehaving an oil tight oil carrying chamber, a drive shaft, lubricatingmechanism automatically operated from said shaft, feed mechanismincluding a feed bar, means extending into said chamber for regulatingthe'throw of said feed bar and havingjwo sets of oppositely inclinedthreads, means for operating said means from the outside of the machinewhile the machine is in operation, and means for preventing the escapeof oil past said first means.

28. In a sewing machine, the combination of a drive shaft, a feed bar, afeed dog carried by said feed bar, a reciprocating feed lever connectedto said shaft and feed bar, and means for adjusting the throw of saidfeed bar and comprising a rotary member havin two sets of differentlyinclined threa 5 effective to maintain said member against displacement.

29. In a sewing machine, the combination of a drive shaft,-a feed bar, afeed dog carried by said feed bar, a reciprocating feed lever connectedto said shaft and feed bar, and means for ad usting the height andlength of feed, said means comprising a swinging supported rotatableeccentric cooperating with the feed bar and a shiftable fulcrumcooperating with the feed lever.

30. In a sewing machine, the combination fulcrum,

of a'driveshaft, a feed bar, a feed dog carriedby said feed bar, areciprocating feed lever connected to said shaft and feed her, and meansfor adjusting the height and length of feed said means comprising aneccentric pivot carried b the feed bar, a movable fulcrum carried bysaid feed lever, and a threaded member for shifting said said memberhaving reverse threads for maintaining itself against displacement. j

.31. In a sewin machine, the combination of a 'hollow mac line frameforming an oil tight chamber carrying an oil bath, a drive shaft,feedactuatingwmechanism connected to said shaft and extending into saidoil chamber, means extending into said oil chamber for adjusting saidfeed actuating mechanism, and means for operating said last means fromthe outsideof saidoil chamber during the operauon of the machine andwithout the escape of oil therefrom.

32. In a sewing machine having a drive shaft and lubricating mechanismautomatically operated therefrom, the combination of a hollow machineframe enclosed against the escape of oil thci efrom and forming an oiltight oil carrying reservoir, a feed lever connected to said shaft, afeed bar connected to said lever, means located entirel within saidframe for regulating the length of stitch and including an adjustablefulcrum for said feed lever, and means operable from the outside of saidmachine frame for operating said means.

33. In a sewing machine, the combination of a machine frame,'a driveshaft carried thereby, a feed bar, means comprising a feed lever foroperating said feed bar from said shaft, an adjustable fulcrumcooperating with said feed lever means for adjusting the same comprisinga slide member and an adjusting screw co-acting therewith, said screwbeing housed within the machine frame against access, and a removableimplement capable of operating said screw while the machine is inoperation, said implement and machine frame having one a scaleindicatingv the length of pitch and the other an indicator cooperating.with said scale.

34. A sewing machine having lubricating mechanism, and comprising ahollow frame forming an oil tight oil carrying chamber forsaidlubricatin mechanism, a shaft extending into said 011 chamber andoperating said mechanism, a feed lever connected to said shaft, a feedbar connected to said lever, and means extending into said oil chamberfor regulating the feed and including an adjustable fulcrum for saidfeed lever.

35. A sewing machine having lubricating mechanism, and com rising an oilti ht hollow machine frame aving an oil 0 amber for said lubricatingmechanism, a drive shaft carried by said frame and operating saidmechanism, feed mechanism, means within said frame for operating saidfeed mechanism from the drive shaft, means cooperating with said lastmeans for regulatingthe feed and extending into said oil chamber, andmeans capable of controlling said last means during the operation of thefeed mechanism and lubricating mechanism.

36. A sewing machine having lubricating mechanism, and comprising an oiltight hollow machine frame having an oil chamber for housing saidmechanism, a drive shaft carried by said frame for automaticallyoperating said mechanism, feed mechanism, means for operating said feedmechanism from the drive shaft, means cooperating with said last meansfor regulating the feed and extending into said oil chamber, anddetachable means accessible from the outside of the machine frame andcapable of con trolling said last means during the operation of the feedmechanism and lubricating mechanism.

37 In a sewing machine, the combination of a machine frame, a shaftcarried thereby, a feed bar, a reciprocating lever connected to thesaidshaft for operating the feed bar, said machine frame having avertical tubular portion having an opening at the top thereof, a rotaryscrew housed insaid tubular portion with the upper end of the screwnormally located a substantial distance below the top of said tubularportion, and an implement having a part adapted to be inserted throughthe top of said tubular portion to co-act with the screw for rotatingthe same, said frame and implement having one ascale and the other anindicator for LtB- termining the length of stitch. V

38. A sewing machine having lubricating mechanism and comprising amachine frame having an oil tight oil chamber, a drive shaft foroperating said mechanism, feed mechanism operated from said shaft, meansnormally inaccessible from the outside of the machine and extending intosaid oil chamber for regulating the feed, and means for preventing theescape of oil from the oil chamber past said means during the operationof said lubricating mechanism. 39. A sewing machine having lubricatingmechanism and comprising a machine frame having an oil tight chamber, adrive shaft for operating said mechanism, feed mechanism operated fromsaid shaft, means extending into said oil chamber for regulating thefeed, means for operating said means from the outside of the machine,and means for preventing the escape of oil from the chamber past saidfirst means.

40. A sewing machine having lubricating mechanism and comprising ahollow machine frame having an oil chamber, a drive shaft operatingsaidlubricating mechanism, a feed bar, a feed lever connected to said feedbar and operated from the shaft, a fulcrum slide cooperating with saidlever, andadjusting screw extending into said oil chamber for shiftingsaid fulcrum slide, means for hous ing said screw against the escape ofoil from said chamber, and means for operating said screw from theoutside of the machine frame.

Signed atNyack, New York, this 8th day of October, 1923.

JOHN P. WEIS.

